Process incoming story messages

ts/test-both/helpers/fakeAttachment.ts

@@ -1,9 +1,10 @@
-// Copyright 2021 Signal Messenger, LLC
+// Copyright 2021-2022 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
 import type {
   AttachmentType,
   AttachmentDraftType,
+  ThumbnailType,
 } from '../../types/Attachment';
 import { IMAGE_JPEG } from '../../types/MIME';
 
@@ -17,6 +18,14 @@ export const fakeAttachment = (
   ...overrides,
 });
 
+export const fakeThumbnail = (url: string): ThumbnailType => ({
+  contentType: IMAGE_JPEG,
+  height: 100,
+  path: url,
+  url,
+  width: 100,
+});
+
 export const fakeDraftAttachment = (
   overrides: Partial<AttachmentDraftType> = {}
 ): AttachmentDraftType => ({